Is this a "combustion engine" achievement or a "road legal wheel-powered" achievement (i.e. not "reactive engine powered car")? In other words, are there any electric cars that are faster? Wikipedia suggests "no" [1].

If that's correct, your comment makes no sense. Many of the developments needed for combustion-powered records would apply to electricity-powered records as well, such as suspension, wheels/tires, gears, ...

[1] https://en.wikipedia.org/wiki/Production_car_speed_record